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Hành vi hấp phụ được cải thiện của EDTA sửa đổi - graphene oxide đối với methylene blue và các ion kim loại nặng
Tóm tắt
Trong nghiên cứu này, cấu trúc axit edetic (EDTA) đã được sửa đổi hóa học bằng axit aspartic và lysine (hai α-amino acid) qua quá trình chức năng hóa liên covalent. EDTA sửa đổi thu được (m-EDTA) đã được sử dụng để chức năng hóa bề mặt graphene oxide (GO) nhằm loại bỏ hiệu quả thuốc nhuộm từ nước thải. Thuốc nhuộm xanh methylene đã được hấp phụ trên chất hấp phụ hybrid thông qua các tương tác π–π với bề mặt GO liên hợp cũng như tương tác tĩnh điện với các vị trí chelat m-EDTA nhiều giá trị. Chất hấp phụ hybrid được tổng hợp đã được đặc trưng bằng phương pháp nhiễu xạ tia X, kính hiển vi điện tử quét, quang phổ hồng ngoại biến đổi Fourier và quang phổ cực tím - khả kiến. 0,03 g chất hấp phụ hybrid tổng hợp đã được sử dụng để xử lý 30 mL chất ô nhiễm (1 g/L). Kết quả cho thấy hiệu quả loại bỏ cao được đạt được trong 20 phút đầu tiên, xác nhận rằng việc sửa đổi GO có tác động tích cực đến hiệu quả loại bỏ.
Từ khóa
#EDTA #graphene oxide #thuốc nhuộm methylene blue #ion kim loại nặng #hấp phụ #xử lý nước thảiTài liệu tham khảo
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